# SDR AALA20170929002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2017
- Submitted: October 3, 2017
- Operation: Air carrier
- Aircraft: [N929AN](https://openairdocs.org/aircraft/N929AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30078
- Aircraft time: 52,669 hours, 21,639 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Plenum
- Part number: 353A204024
- Condition: Cracked
- Location: Apu
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170929002

## Discrepancy

AIRCRAFT WAS IN BASE MAINTENANCE.  CRACKED AUXILIARY POWER UNIT INLET DUCT PLENUM ASSEMBLY.  REMOVED AND REPLACED PLENUM PANEL PER SRM 53-80-30-01, AARD 51-20-01-1, AND AMM 49-15-15.

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